Beefing the collection: Psychedelic rock and Funk

I feel like I should have more of both of those in my collection. Recently snagged some Beach Boys, H.P. Lovecraft, everything The Doors, and other assorted psychedelia. However, I feel as if I'm missing out on a vast majority of the genre, but out of ignorance and lethargy don't know what all to look for and get into. Suggestions? Mainly looking for older incarnations of the genre (IE: Pet Sounds, Piper at the Gates of Dawn, etc). That slower, simpler, harmonic and trance-like sound.

And outside of Funkadelic and Prince, I don't have much funk. More suggestions on some funky **** to get?

__________________Jlausen: "Think of what 90% of people do on PCP.

They rip their skin off and rape anything in sight. Basically a Shel Silverstein poem."

I love "Presence of the Lord". It's got this really calm mellow vibe throughout the song, but it's got a goofy wah wah solo drenched in this psychedelic tone. They did a BBC Sessions album that is pretty good, much like Hendrix's.